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Elena L [17]
3 years ago
15

4.2 moles of copper contains

Chemistry
1 answer:
ehidna [41]3 years ago
5 0

To obtain one mole of copper atoms (6.02 x 1023 atoms), weigh out 63.55 g copper. The molar mass (M) of a substance is the mass of one mole of entities (atoms, molecules, or formula units) of the substance. Molar mass has units of grams per mole (g/mol).
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The density of water at 4 degrees Celsius is 1.00 g/cm cubed at unknown object has density of 7.9 g/cm cubed would you expect it
NNADVOKAT [17]

Answer:

The object will be sank

Explanation:

In this case the object is more dense than water.

Density is the relationship between a certain amount of mass of matter and the volume that is being occupied by it.

The object occupies more volume, so it occupies more mass.

As the mass from the object is higher, the object will be sank because the weight is higher than the weight from the liquid.

If the object has a lower density than the water, it will float on it.

7 0
4 years ago
Why is copper used to make hot water tanks not steel.
Makovka662 [10]
Copper does not react with hot water or steam
7 0
3 years ago
Write L values for the following energy levels. What orbital shapes exist in each of
den301095 [7]

Answer:

n   l    m  

����������������������������������

1   0    0 1s 1 2 2

����������������������������������

2   0    0 2s 1 2  

2   1    1,0,-1 2p 3 6 8

����������������������������������

3   0    0 3s 1 2  

3   1    1,0,-1 3p 3 6  

3   2    2,1,0,-1,-2 3d 5 10 18

����������������������������������

4   0    0 4s 1 2  

4   1    1,0,-1 4p 3 6  

4   2    2,1,0,-1,-2 4d 5 10  

4   3    3,2,1,0,-1,-2,-3 4f 7 14 32

Explanation:

4 0
3 years ago
Which of these is a pure substance
Galina-37 [17]

Both A and B are the answer.


4 0
4 years ago
If you measure the mass of a liquid is 11.50 g and its volume as 9.03 ml how many significant figures should its density value h
MAXImum [283]

To get a result with the best degree of precision, the number of significant figures should be equal to the smallest number of significant figures of the given numbers. In this case, the smallest is 3 as given by the number 9.03 mL.

Therefore density is:

<span>11.50 g / 9.03 mL = 1.27 g/mL</span>

3 0
3 years ago
Read 2 more answers
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